Cognitive radio systems have taken a fore-running position in the wireless communication
technology. With most of the communication taking place through multi-carrier systems, the …

Radio spectrum is the backbone for wireless communication. Many recent studies show that
most of the available spectrum has already been allocated. Cognitive radio (CR) provides a …

The secondary users can opportunistically use the channels in such a way that there is no
interference to primary users' communications in cognitive radio networks. The optimization …

Wireless communication is an emerging technology in recent days which involves the
transmission of data or information over a wide range of distance. The wireless network is …

Wireless devices increase the comfort of human life by reducing labor work and data
reading accuracy. Wireless device transfer data though allotted spectrum or free available …